Seoul Semiconductor has commenced mass production of its LED chip-on-board package for use in LED filament bulbs. These filament LEDs can realise high-quality light close to natural light through differentiated chip-on-board (COB) packaging technology and can produce stunning emotional lighting with omnidirectional emission technology, combining a small footprint with a wide beam angle.
The colour rendering index (CRI) is 80 or better and different LEDs with a flux between 105 and 210 lumens are available. All of them feature a correlated colour temperature (CCT) of 2700 K. Therefore, they are used to create a classical atmosphere through high-quality light in many spaces, like cafes and hotels or even bedrooms and living rooms, making them an alternative to incandescent light bulbs.
According to the company, development of this technology started already in the early 2000s, but production was held back until the market was ready for them. The global light bulb market is estimated at 7 billion pieces annually, of which 2,5 billion units are light bulbs for various decorative purposes, a market being addressed by filament LEDs. The filament LED bulb market is currently estimated to be $1,3 billion globally.
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